(KUTV) -- A 15-year-old boy is in police custody and a 16-year-old girl is in the hospital after the underage teen allegedly wrecked a stolen vehicle.

Officers with the Salt Lake City Police Department were at the scene of a stabbing downtown when a car sped by them going about 80 mph in a 25 mph zone.

Police told 2News that the driver was going so fast he wasn't able to make the curve just north of the Dollar Tree.

The car then plowed into trees near the Tesoro gas station.

The trees were mangled and the car is a total wreck. Officials reported finding pieces of the car more than 40 yards way from the wreckage.

Police say the 15-year-old driver and his 16-year-old girlfriend, who was in the passengers seat, are lucky to be alive.

The roof of the car caved in during the crash, so the girl had to be cut out of the wreckage.

The 16-year-old suffered serious injuries and was taken to the hospital. The 15-year-old suffered minor injuries and is facing several charges, including: DUI with serious injury, reckless driving, driving without a license and other pending charges.

Police say this is the second car the juvenile stole in the past few days. The owner of the vehicle has been contacted by police.